US3789215A - Photosensitive document detector with automatic compensation - Google Patents

Photosensitive document detector with automatic compensation Download PDF

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Publication number
US3789215A
US3789215A US00287301A US3789215DA US3789215A US 3789215 A US3789215 A US 3789215A US 00287301 A US00287301 A US 00287301A US 3789215D A US3789215D A US 3789215DA US 3789215 A US3789215 A US 3789215A
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US
United States
Prior art keywords
output
circuit means
voltage
circuit
detector
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Expired - Lifetime
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US00287301A
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English (en)
Inventor
R Penny
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International Business Machines Corp
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International Business Machines Corp
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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10544—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
    • G06K7/10821—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices
    • G06K7/10851—Circuits for pulse shaping, amplifying, eliminating noise signals, checking the function of the sensing device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/25—Movable or adjustable work or tool supports
    • B23Q1/26—Movable or adjustable work or tool supports characterised by constructional features relating to the co-operation of relatively movable members; Means for preventing relative movement of such members
    • B23Q1/28—Means for securing sliding members in any desired position
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B5/00—Clamps
    • B25B5/14—Clamps for work of special profile
    • B25B5/142—Clamps for work of special profile for windows and frames
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination

Definitions

  • thresholds In order to detect the passage of single 'or multiple documents, thresholds must be established against which the output of the detector must be compared. In the case of multiple document detection, the threshold levels must be precisely controlled. The generation of the threshold level has not proven a problem, however, long term variations in the output of the light source requires the periodic adjustment of the established threshold. Variations in other circuit components require similar adjustments, however, to a far lesser degree.
  • FIG. 5 is a partial schematic diagram of an alternative of FIG. 1.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Electromagnetism (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Theoretical Computer Science (AREA)
  • Biochemistry (AREA)
  • Artificial Intelligence (AREA)
  • Toxicology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Sorting Of Articles (AREA)
  • Conveying Record Carriers (AREA)
  • Control Of Conveyors (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Controlling Sheets Or Webs (AREA)
US00287301A 1972-09-08 1972-09-08 Photosensitive document detector with automatic compensation Expired - Lifetime US3789215A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US28730172A 1972-09-08 1972-09-08

Publications (1)

Publication Number Publication Date
US3789215A true US3789215A (en) 1974-01-29

Family

ID=23102306

Family Applications (1)

Application Number Title Priority Date Filing Date
US00287301A Expired - Lifetime US3789215A (en) 1972-09-08 1972-09-08 Photosensitive document detector with automatic compensation

Country Status (7)

Country Link
US (1) US3789215A (cs)
JP (1) JPS5416097B2 (cs)
CA (1) CA1012626A (cs)
DE (1) DE2344922A1 (cs)
FR (1) FR2199400A5 (cs)
GB (1) GB1395851A (cs)
IT (1) IT989314B (cs)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3899686A (en) * 1972-10-27 1975-08-12 Bobst Fils Sa J Apparatus and method for controlling registration
US4027154A (en) * 1975-12-29 1977-05-31 Bell & Howell Company Electronic document detector circuitry with feedback control
US4036763A (en) * 1974-08-14 1977-07-19 Hawker Siddeley Dynamics Limited Noise and drift correcting amplifier circuit for a live-scan imaging system
US4101784A (en) * 1976-08-09 1978-07-18 Scientific Technology Incorporated Color mark detector
US4219737A (en) * 1978-12-18 1980-08-26 Visual Systems Corporation Self regulating microfilm frame detection circuit
US4243876A (en) * 1979-07-25 1981-01-06 Westinghouse Electric Corp. Background light intensity compensation circuit for a line scan camera system
WO1982001698A1 (en) * 1980-11-07 1982-05-27 Tee Victor G Apparatus for detecting the thickness of sheets
EP0111377A1 (en) * 1982-12-14 1984-06-20 Adolph Coors Company Photomultiplier tube assembly
US4670647A (en) * 1984-09-27 1987-06-02 Xerox Corporation Dirt insensitive optical paper path sensor
US5283424A (en) * 1992-10-19 1994-02-01 Xerox Corporation Optical paper sensor having alterable sensitivity and illumination intensity
US5289011A (en) * 1992-11-30 1994-02-22 Xerox Corporation Sensor control system and method compensating for degradation of the sensor and indicating a necessity of service prior to sensor failure
US20030209680A1 (en) * 2002-05-10 2003-11-13 Creo Il. Ltd. Edge position detector

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4004234A (en) * 1975-06-23 1977-01-18 Owens-Illinois, Inc. Article presence sensor
CA1129549A (en) * 1978-09-18 1982-08-10 Transaction Technology, Inc. Adaptive threshold optical reader
JPS55112585A (en) * 1979-02-22 1980-08-30 Konishiroku Photo Ind Co Ltd Photo detection unit of moving object
FR2546083B1 (fr) * 1983-05-20 1986-04-18 Hotchkiss Brandt Sogeme Dispositif de detection de prises multiples d'objets
US4571055A (en) * 1983-12-17 1986-02-18 Sharp Kabushiki Kaisha Transport item detecting arrangement
KR910001269B1 (ko) * 1986-07-11 1991-02-26 로우렐 뱅크 머시인 가부시끼가이샤 광센서 조정용 장치
DE3803034C3 (de) * 1988-02-02 1994-10-20 Sick Optik Elektronik Erwin Photoempfänger
DE4335870C2 (de) * 1993-10-21 1998-01-29 Leuze Electronic Gmbh & Co Einrichtung zum optischen Erfassen von mehrlagig einlaufenden Papierbögen

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3660670A (en) * 1970-12-21 1972-05-02 Eastman Kodak Co Document detecting and counting apparatus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3660670A (en) * 1970-12-21 1972-05-02 Eastman Kodak Co Document detecting and counting apparatus

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3899686A (en) * 1972-10-27 1975-08-12 Bobst Fils Sa J Apparatus and method for controlling registration
US4036763A (en) * 1974-08-14 1977-07-19 Hawker Siddeley Dynamics Limited Noise and drift correcting amplifier circuit for a live-scan imaging system
US4027154A (en) * 1975-12-29 1977-05-31 Bell & Howell Company Electronic document detector circuitry with feedback control
US4101784A (en) * 1976-08-09 1978-07-18 Scientific Technology Incorporated Color mark detector
US4219737A (en) * 1978-12-18 1980-08-26 Visual Systems Corporation Self regulating microfilm frame detection circuit
US4243876A (en) * 1979-07-25 1981-01-06 Westinghouse Electric Corp. Background light intensity compensation circuit for a line scan camera system
WO1982001698A1 (en) * 1980-11-07 1982-05-27 Tee Victor G Apparatus for detecting the thickness of sheets
EP0111377A1 (en) * 1982-12-14 1984-06-20 Adolph Coors Company Photomultiplier tube assembly
US4670647A (en) * 1984-09-27 1987-06-02 Xerox Corporation Dirt insensitive optical paper path sensor
US5283424A (en) * 1992-10-19 1994-02-01 Xerox Corporation Optical paper sensor having alterable sensitivity and illumination intensity
US5289011A (en) * 1992-11-30 1994-02-22 Xerox Corporation Sensor control system and method compensating for degradation of the sensor and indicating a necessity of service prior to sensor failure
US20030209680A1 (en) * 2002-05-10 2003-11-13 Creo Il. Ltd. Edge position detector

Also Published As

Publication number Publication date
FR2199400A5 (cs) 1974-04-05
IT989314B (it) 1975-05-20
DE2344922A1 (de) 1974-03-28
JPS5416097B2 (cs) 1979-06-20
GB1395851A (en) 1975-05-29
JPS4966027A (cs) 1974-06-26
CA1012626A (en) 1977-06-21

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